Add 15/72 and 20/12
1st number: 15/72, 2nd number: 1 8/12
15/72 + 20/12 is 15/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 12 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 72 × 1 = 72,
15/72 = 15 × 1/72 × 1 = 15/72 - Likewise, for the 2nd fraction, since 12 × 6 = 72,
20/12 = 20 × 6/12 × 6 = 120/72 - Add the two like fractions:
15/72 + 120/72 = 15 + 120/72 = 135/72 - 135/72 simplified gives 15/8
- So, 15/72 + 20/12 = 15/8
In mixed form: 17/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/72+20/12 15/72+40/12 15/72+20/24 45/72+20/12 15/72+60/12 15/72+20/36 75/72+20/12 15/72+20/60 15/72+20/84